44x + 55x + 77x = 6,464 centimeters.
x =
36.7272727273
Therefore the sides are
44*36.7272727273 = 1,616
55*36.7272727273 = 2,020
77*
36.7272727273
= 2,828
OR maybe that's another of those infamous Brainly typos.
4x + 5x + 7x = 64 centimeters.
x = 8
Therefore the sides are
4*8 = 32
5*8 = 40 and
7*8 = 56 centimeters